CN111119026B - Assembled steel-concrete combined structure for reinforcing long-span box type arch bridge - Google Patents
Assembled steel-concrete combined structure for reinforcing long-span box type arch bridge Download PDFInfo
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- CN111119026B CN111119026B CN201911417891.XA CN201911417891A CN111119026B CN 111119026 B CN111119026 B CN 111119026B CN 201911417891 A CN201911417891 A CN 201911417891A CN 111119026 B CN111119026 B CN 111119026B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention discloses an assembly type reinforced concrete composite structure for reinforcing a large-span box type arch bridge, which comprises reinforcing members arranged at two sides of a main arch and transverse connecting members respectively connected with the reinforcing members transversely through an arch belly and an arch back, wherein the reinforcing members and the transverse connecting members form hoop structures for transversely and longitudinally reinforcing the main arch; adopt the steel-concrete integrated configuration to consolidate and reform transform long-span box arched bridge, strengthen the horizontal connection and the wholeness of new and old structure for new and old structure atress jointly need not to set up support and template, only need simple and easy hanging flower basket construction can, consolidate and reform transform the time limit for a project shorter, the efficiency of construction is high, and engineering total cost is lower.
Description
Technical Field
The invention relates to the field of bridge reinforcement and reconstruction, in particular to an assembly type steel-concrete combined structure for reinforcing a long-span box type arch bridge.
Background
The arch bridge plays a very important role in the transportation of China, however, various bridge diseases occur due to various reasons, and some common arch bridge reinforcing and widening methods have some defects in certain specific environments and requirements. For example: in a common pasting method, steel materials are easy to corrode, steel plates are difficult to bend and form, and the integrity of the pasted steel plates is poor; the method for increasing the section of the arch ring needs to build a support, and certain construction and cost limitations exist in certain specific areas and environments.
Disclosure of Invention
In view of the above, the invention aims to provide an assembled reinforced concrete composite structure for reinforcing a large-span box arch bridge, which is used for reinforcing and reconstructing the large-span box arch bridge by adopting the reinforced concrete composite structure, so that the transverse connection and integrity of a new structure and an old structure are enhanced, the new structure and the old structure are stressed together, a support and a template do not need to be erected, only a simple hanging basket is needed for construction, the reinforcing and reconstructing construction period is short, the influence on bridge traffic is small, and the total construction cost is low.
The invention discloses an assembly type steel-concrete combined structure for reinforcing a large-span box type arch bridge, which comprises reinforcing members arranged on two sides of a main arch and transverse connecting members respectively connected with the reinforcing members transversely through an arch belly and an arch back, wherein the reinforcing members and the transverse connecting members form a hoop structure for transversely and longitudinally reinforcing the main arch.
Further, the reinforcing member is a reinforced concrete structure which is fixedly connected with the main arch ring and increases the cross section of the steel box in the transverse bridge direction;
further, the reinforcing member comprises a groove-shaped widening part and a connecting part for fixedly connecting the groove-shaped widening part to the main arch ring, and concrete is poured between the groove-shaped widening part and the main arch ring;
further, the groove-shaped widening piece is composed of a top plate, a bottom plate and side plates, and the top plate and the bottom plate are fixedly connected with the arch ring through connecting pieces;
furthermore, the connecting piece and the groove-shaped widening piece are welded and fixed to form a box-shaped structure along the longitudinal bridge direction, the connecting piece and the main arch ring are fixedly connected through expansion bolts, and grouting holes are formed in the top plate;
further, the connecting piece comprises a steel plate fixedly connected with the main arch ring and a welding piece which is used for being respectively welded and fixed with the top plate and the bottom plate of the groove-shaped widening piece;
furthermore, PBL shear force keys are arranged on the groove-shaped widening part and the connecting part, longitudinal stress ribs are arranged on the PBL shear force keys of the groove-shaped widening part, the stress ribs penetrate through the PBL shear force keys of the connecting part, and the longitudinal stress ribs are distributed at equal intervals along the longitudinal direction of the main arch ring;
further, the transverse connecting members are respectively and transversely fixed on the arch belly and the arch back through expansion screws and are welded and fixed with the reinforcing members on two sides of the main arch;
further, the transverse connecting member is an I-shaped steel;
furthermore, one flange of the I-shaped steel is fixed perpendicular to the main arch through an expansion bolt, and two ends of the I-shaped steel are welded with the reinforcing member.
The invention has the beneficial effects that: the invention discloses an assembly type reinforced concrete combined structure for reinforcing a large-span box type arch bridge, which is characterized in that the large-span box type arch bridge is reinforced and transformed by adopting the reinforced concrete combined structure, the transverse connection and the integrity of a new structure and an old structure are enhanced, the new structure and the old structure are stressed together, a support and a template do not need to be erected, only simple hanging basket construction is needed, the construction efficiency is high, the reinforcing and transforming construction period is short, the influence on bridge traffic is small, and the total construction cost is low.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic view of a connector configuration of a reinforcement member of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a channel-shaped widening according to the invention;
FIG. 4 is a cross-sectional view of the steel box after welding the connecting members;
FIG. 5 is a perspective view of the welded connector;
FIG. 6 is a cross-sectional view of the assembled reinforcement member;
FIG. 7 is a schematic view of a cross-link construction;
FIG. 8 is a cross-sectional view of the cross-link after installation;
FIG. 9 is a top view of the transverse link after installation;
figure 10 is a cross-sectional view of a composite structural reinforcing steel beam.
Detailed Description
The invention relates to an assembly type steel-concrete combined structure for reinforcing a large-span box type arch bridge, which comprises reinforcing members arranged on two sides of a main arch and transverse connecting members 4 respectively connected with the reinforcing members transversely through an arch belly and an arch back, wherein the reinforcing members and the transverse connecting members 4 form hoop structures for transversely and longitudinally reinforcing the main arch; the reinforcing members are arranged on arch rings on two sides of the main arch to transversely reinforce the main arch, the transverse connecting members 4 are respectively arranged on the arch belly and the arch back and are connected with the reinforcing members on two sides of the main arch to longitudinally reinforce the main arch, the transverse connecting members 4 form an up-down connection reinforcing structure, and the formed hoop structure enhances the transverse connection and integrity of a new structure and an old structure, so that the new structure and the old structure are stressed together.
In the embodiment, the reinforcing member is a reinforced concrete structure which is fixedly connected with the main arch ring 1 and increases the cross section of the steel box in the transverse bridge direction; structural strength is high, with the structural connection intensity of the main arch of old bridge, strengthens the wholeness of new and old structure simultaneously for whole structure forms composite construction, improves the whole bearing capacity of reinforced structure.
In the embodiment, the reinforcing member comprises a groove-shaped widening part 2 and a connecting part 3 for fixedly connecting the groove-shaped widening part 2 to the main arch ring 1, and concrete is poured between the groove-shaped widening part 2 and the main arch ring 1; a pouring space is formed between the groove-shaped widening part 2 and the main arch ring 1, so that pouring of concrete is facilitated, the integral structure is formed, the structure is simple, construction operation is easy, the structural strength is high, and the integrity of a new structure and an old structure is stronger. During construction, the installation of the groove-shaped widening part 2 and the connecting part 3 only needs to be carried out through simple hanging baskets, a support does not need to be erected, and the steel box serves as a concrete template, so that a template does not need to be erected additionally, and the construction procedures are reduced.
In this embodiment, the groove-shaped widening part 2 is composed of a top plate 21, a bottom plate 22 and side plates 23, and the top plate 21 and the bottom plate 22 are fixedly connected with the arch ring through a connecting part 3; the top plate 21, the bottom plate 22 and the side plates 23 are all made of weather-resistant steel plates, the groove-shaped widening part 2 is conveyed to a bridge after being manufactured in a factory, and is connected with the connecting part 3 in a welding mode through a simple working hanging basket, and construction is simple.
In the embodiment, the connecting piece 3 and the groove-shaped widening piece 2 are welded and fixed to form a box-shaped structure along the longitudinal bridge direction, the connecting piece 3 and the main arch ring 1 are fixedly connected through expansion bolts, and the top plate 21 is provided with grouting holes 27; the reinforced concrete structure is integrally formed with the reinforcing members and the connectors 3 by pouring cement concrete into the box-shaped structure through the grout holes 27, integrity and bearing capacity of the new and old composite structures are ensured, and no additional formwork is required to be erected.
In this embodiment, the connecting member 3 includes a steel plate 31 fixedly connected with the main arch ring 1 and a welding member 32 for welding and fixing with the top plate 21 and the bottom plate 22 of the groove-shaped widening member 2 respectively; the groove-shaped widening part 2 and the connecting part 3 are both provided with PBL shear keys (24, 33), longitudinal through long stress ribs 25 for the PBL shear keys 24 and through stress ribs 35 for the PBL shear keys 33; the longitudinal stress ribs 35 are distributed at equal intervals along the longitudinal direction (along the bridge direction) of the main arch ring; the welding members 32 are preferably equilateral angles, which facilitate the welding and fixing to the steel plate 31 and also to the top plate 21 and the bottom plate 22 of the channel-shaped widening 2. One side of the angle steel which is generally equal-edge angle steel is welded with the steel plate 31 of the connecting piece 3, and the other side is welded with the top plate 21 or the bottom plate 22 of the groove-shaped widening piece 2. That is, the equal angle steels are respectively arranged on the steel plate 31 of the connecting member corresponding to the top plate 21 and the bottom plate 22 of the channel-shaped widening member 2 and have a vertically (vertically) symmetrical structure. The inner sides of the top plate 21, the bottom plate 22 and the side plate 23 of the groove-shaped widening part 2 are respectively provided with a small-sized PBL shear key, the PBL shear keys on the inner sides of the top plate 21 and the bottom plate 22 of the groove-shaped widening part 2 are relatively symmetrical, and a stress rib 25 penetrates through a shear hole 26 of the PBL shear key. PBL shear keys are arranged between the upper welding piece 32 and the lower welding piece 32 of the top plate 21 and the bottom plate 22 of the corresponding groove-shaped widening piece 2 of the connecting piece 3, the through stress ribs 35 are arranged in shear holes 34 of the PBL shear keys, the connecting piece 3 is connected with the old structure 5 through implanted screws 36, the connecting piece 3 and the steel box widening piece are connected together through welding (non-main connection), and the steel box-concrete combined reinforcing structure is connected with the old structure 5 through the PBL shear keys, so that the whole reinforcing structure and the old structure 5 are stressed integrally.
In the embodiment, the transverse connecting members 4 are respectively fixed on the arch belly and the arch back in the transverse direction through expansion screws and are welded and fixed with the reinforcing members on two sides of the main arch; through implanting the expansion screw with horizontal coupling member 4 along horizontal bridge respectively to being fixed in the hunch abdomen and hunch back and with the reinforcement member welded fastening of main hunch both sides, the cuff structural integrity that forms is stronger, the structure is more stable, the fastness is higher for new and old structure atress jointly.
In this embodiment, the transverse coupling member 4 is an i-steel 41; one flange of the i-steel 41 is fixed perpendicular to the main arch by an expansion bolt 44, and both ends of the i-steel are welded to the reinforcing member. Certain bolt holes are reserved in the lower side or the upper side of each I-steel 41, and the I-steel is convenient to install on the arch belly and the arch back in the later period to form an upper connection 42 and a lower connection 43 structure.
When the arch bridge is reinforced and transformed by adopting the structure, a bracket and a template do not need to be erected, only simple and easy-to-work hanging basket construction is needed, although the steel consumption is large, the whole reinforcing and transforming period is short, so the overall construction cost is low, and the method has a wide engineering application prospect.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. The utility model provides an assembled steel reinforced concrete integrated configuration for consolidating long-span box arched bridge which characterized in that: the reinforcing member and the transverse connecting member form a hoop structure for reinforcing the main arch transversely and longitudinally; the reinforcing member comprises a groove-shaped widening part and a connecting part for fixedly connecting the groove-shaped widening part to the main arch ring, concrete is poured between the groove-shaped widening part and the main arch ring, the groove-shaped widening part comprises a top plate, a bottom plate and side plates, and the top plate and the bottom plate are fixedly connected with the arch ring through the connecting part; the connecting piece and the groove-shaped widening piece are welded and fixed to form a box-shaped structure along the longitudinal bridge direction, the connecting piece and the main arch ring are fixedly connected through expansion bolts, and grouting holes are formed in the top plate.
2. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 1, wherein: the reinforcing component is a reinforced concrete structure which is fixedly connected with the main arch ring and increases the axial section of the steel box transverse bridge.
3. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 2, wherein: the connecting piece comprises a steel plate fixedly connected with the main arch ring and a welding piece which is respectively welded and fixed with the top plate and the bottom plate of the groove-shaped widening piece.
4. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 3, wherein: PBL shear keys are arranged on the groove-shaped widening part and the connecting part, longitudinal through long stress ribs are arranged on the PBL shear keys of the groove-shaped widening part, the stress ribs penetrate through the PBL shear keys of the connecting part, and the longitudinal stress ribs are distributed at equal intervals along the longitudinal direction of the main arch ring.
5. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 1, wherein: the transverse connecting members are respectively and transversely fixed on the arch belly and the arch back through expansion screws and are welded and fixed with the reinforcing members on two sides of the main arch.
6. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 5, wherein: the transverse connecting member is I-shaped steel.
7. The assembled steel-concrete composite structure for reinforcing a long-span box arch bridge of claim 6, wherein: one flange of the I-shaped steel is fixed perpendicular to the main arch through an expansion bolt, and two ends of the I-shaped steel are welded with the reinforcing member.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417891.XA CN111119026B (en) | 2019-12-31 | 2019-12-31 | Assembled steel-concrete combined structure for reinforcing long-span box type arch bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911417891.XA CN111119026B (en) | 2019-12-31 | 2019-12-31 | Assembled steel-concrete combined structure for reinforcing long-span box type arch bridge |
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| CN111119026A CN111119026A (en) | 2020-05-08 |
| CN111119026B true CN111119026B (en) | 2022-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111608084B (en) * | 2020-05-29 | 2022-03-29 | 中国铁建大桥工程局集团有限公司 | Integral prefabrication and assembly construction method for reinforced concrete arch bridge arch ring segments |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010185233A (en) * | 2009-02-13 | 2010-08-26 | Yoshimoto Honke Sekizaiten:Kk | Structure for reinforcing balustrade of stone bridge |
| CN103397604A (en) * | 2013-07-19 | 2013-11-20 | 重庆交通大学 | Stone arch bridge structure compositely strengthened by aid of grooved arch ribs |
| CN204780641U (en) * | 2015-06-16 | 2015-11-18 | 山东科技大学 | Old arched bridge reinforced structure of combined type barnacle |
| CN207452682U (en) * | 2017-11-09 | 2018-06-05 | 广州市第三市政工程有限公司 | A kind of structure of newly-increased reinforced concrete ribbed arch stone arch bridge strengthened by composite main arch arch ring |
| CN108716191A (en) * | 2018-08-16 | 2018-10-30 | 中交路桥北方工程有限公司 | A kind of concrete arch rib Covered with Angles sleeve-board group and its bracing means |
| CN109868757A (en) * | 2019-04-08 | 2019-06-11 | 大连理工大学 | A kind of reinforcing device and method of suspention system arch bridge |
-
2019
- 2019-12-31 CN CN201911417891.XA patent/CN111119026B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010185233A (en) * | 2009-02-13 | 2010-08-26 | Yoshimoto Honke Sekizaiten:Kk | Structure for reinforcing balustrade of stone bridge |
| CN103397604A (en) * | 2013-07-19 | 2013-11-20 | 重庆交通大学 | Stone arch bridge structure compositely strengthened by aid of grooved arch ribs |
| CN204780641U (en) * | 2015-06-16 | 2015-11-18 | 山东科技大学 | Old arched bridge reinforced structure of combined type barnacle |
| CN207452682U (en) * | 2017-11-09 | 2018-06-05 | 广州市第三市政工程有限公司 | A kind of structure of newly-increased reinforced concrete ribbed arch stone arch bridge strengthened by composite main arch arch ring |
| CN108716191A (en) * | 2018-08-16 | 2018-10-30 | 中交路桥北方工程有限公司 | A kind of concrete arch rib Covered with Angles sleeve-board group and its bracing means |
| CN109868757A (en) * | 2019-04-08 | 2019-06-11 | 大连理工大学 | A kind of reinforcing device and method of suspention system arch bridge |
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